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Thomas H. WOOD Robert D. FELDMAN
As a result of increasing demand and regulatory changes, access systems are undergoing significant expansion. Although wireless and copper-based systems are being deployed, fiber access systems provide the best conduit for broadband services. Significant deployment and trials of Hybrid Fiber-Coax (HFC) and Switched Digital Video (SDV) systems are underway, and additional architectures are being considered for future upgraded networks. We review the progress in this field, and indicate where enabling device technologies can provide key functions.
Junji TAKAYAMA Yasuo OHTSUBO Kazunari FURUGEN Ryutaro FUJISHIMA Makoto IWAMOTO Hirofumi HORIKOSHI Ichiro ARITA
This paper analyzed the connection points of Main Distribution Frames (MDF), which are installed between outside plants and inside plants (service nodes). This paper also proposes a connecting system for forthcoming FITL (Fiber In The Loop) networks. NTT has developed the Subscriber Line Cross-Connecting Module (LXM) for the FITL network and will continue to introduce LXMs and deploy optic subscriber networks in big cities throughout Japan.